Find the value of the linear correlation coefficient r.
-The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands): $$\begin{array} { c | r r r r r r r r }
\text { Cost } & 9 & 2 & 3 & 4 & 2 & 5 & 9 & 10 \
\hline \text { Number } & 85 & 52 & 55 & 68 & 67 & 86 & 83 & 73
\end{array}$$
A) 0.246
B) -0.071
C) 0.235
D) 0.708

Question

Find the value of the linear correlation coefficient r.
-The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands): $$\begin{array} { c | r r r r r r r r } 
\text { Cost } & 9 & 2 & 3 & 4 & 2 & 5 & 9 & 10 \
\hline \text { Number } & 85 & 52 & 55 & 68 & 67 & 86 & 83 & 73
\end{array}$$
A) 0.246
B) -0.071
C) 0.235
D) 0.708

Quizplus · Accepted Answer

We can use a calculator or software to find the value of the linear correlation coefficient r. Using a calculator, we enter the data into two lists and then calculate r. The result is r = 0.708. Therefore, the best choice is D.

Find the Value of the Linear Correlation Coefficient R A) 0246 B) -0

Find the Value of the Linear Correlation Coefficient R A) 0246
B) -0